<script setup>
import * as echarts from "echarts";

let xaxisData = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"];
let yaxisData = [90, 80, 100, 70, 65, 69, 80];
let yaxisData2 = Array(7)
  .fill(0)
  .map(() => parseInt(Math.random() * 100));
const offsetX = 10;
const offsetY = 5;
// 绘制左侧面
const CubeLeft = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0,
  },
  buildPath: function (ctx, shape) {
    // 会canvas的应该都能看得懂，shape是从custom传入的
    const xAxisPoint = shape.xAxisPoint;
    const c0 = [shape.x, shape.y];
    const c1 = [shape.x - offsetX, shape.y - offsetY];
    const c2 = [xAxisPoint[0] - offsetX, xAxisPoint[1] - offsetY];
    const c3 = [xAxisPoint[0], xAxisPoint[1]];
    ctx
      .moveTo(c0[0], c0[1])
      .lineTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .closePath();
  },
});

// 绘制右侧面
const CubeRight = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0,
  },
  buildPath: function (ctx, shape) {
    const xAxisPoint = shape.xAxisPoint;
    const c1 = [shape.x, shape.y];
    const c2 = [xAxisPoint[0], xAxisPoint[1]];
    const c3 = [xAxisPoint[0] + offsetX, xAxisPoint[1] - offsetY];
    const c4 = [shape.x + offsetX, shape.y - offsetY];
    ctx
      .moveTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .lineTo(c4[0], c4[1])
      .closePath();
  },
});

// 绘制顶面
const CubeTop = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0,
  },
  buildPath: function (ctx, shape) {
    const c1 = [shape.x, shape.y];
    const c2 = [shape.x + offsetX, shape.y - offsetY]; //右点
    const c3 = [shape.x, shape.y - offsetX];
    const c4 = [shape.x - offsetX, shape.y - offsetY];
    ctx
      .moveTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .lineTo(c4[0], c4[1])
      .closePath();
  },
});

// 注册三个面图形
echarts.graphic.registerShape("CubeLeft", CubeLeft);
echarts.graphic.registerShape("CubeRight", CubeRight);
echarts.graphic.registerShape("CubeTop", CubeTop);

const option = {
  xAxis: {
    type: "category",
    data: xaxisData,
    axisLine: {
      show: true,
      lineStyle: {
        width: 1,
      },
    },
    axisTick: {
      show: false,
    },
    axisLabel: {
      fontSize: 20,
    },
  },
  yAxis: {
    type: "value",
  },
  series: [
    {
      type: "custom",
      renderItem: (params, api) => {
        const location = api.coord([api.value(0), api.value(1)]);
        const xAxisPoint = api.coord([api.value(0), 0]);
        const distance = 30;
        return {
          type: "group",
          children: [
            {
              type: "CubeLeft",
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0] - distance,
                y: location[1],
                xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
              },
              style: {
                fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: "#152E89",
                  },
                  {
                    offset: 0.35,
                    color: "#088BFF",
                  },
                  {
                    offset: 1,
                    color: "transparent",
                  },
                ]),
              },
            },
            {
              type: "CubeRight",
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0] - distance,
                y: location[1],
                xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
              },
              style: {
                fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: "#152E89",
                  },
                  {
                    offset: 0.35,
                    color: "#088BFF",
                  },
                  {
                    offset: 1,
                    color: "transparent",
                  },
                ]),
              },
            },
            {
              type: "CubeTop",
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0] - distance,
                y: location[1],
                xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
              },
              style: {
                fill: "#088BFF",
              },
            },
          ],
        };
      },
      data: yaxisData2,
    },
  ],
};
</script>

<template>
  <div class="charts">
    <NfCharts :options="option" />
  </div>
</template>

<style scoped lang="scss">
.charts {
  width: 100%;
  height: 300px;
}
</style>
